/* Bounce Sync - Classroom Breathing Game */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #0f0f1a;
    --bg-medium: #1a1a2e;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --accent-glow: #a78bfa;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --success: #10b981;
    --warning: #f59e0b;
}

body {
    font-family: 'Nunito', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
    min-height: 100vh;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

#game-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Screens */
.screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-medium) 100%);
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

/* Role Selection */
.role-content {
    text-align: center;
    padding: 40px 20px;
    max-width: 500px;
}

.logo-area {
    margin-bottom: 48px;
}

.logo-ball {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    margin: 0 auto 24px;
    box-shadow: 
        0 0 40px rgba(102, 126, 234, 0.4),
        0 0 80px rgba(102, 126, 234, 0.2);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.logo-area h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 42px;
    font-weight: 600;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff, var(--accent-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 18px;
    color: var(--text-secondary);
}

.role-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.role-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 24px 32px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.role-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.role-icon {
    font-size: 36px;
}

.role-title {
    font-size: 20px;
    font-weight: 700;
}

.role-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

.host-btn:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px rgba(102, 126, 234, 0.3);
}

.join-btn:hover {
    border-color: var(--success);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.3);
}

/* Join Screen */
.join-content {
    text-align: center;
    padding: 40px 20px;
    max-width: 400px;
}

.back-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    font-family: inherit;
    padding: 10px;
}

.back-btn:hover {
    color: white;
}

.join-content h2 {
    font-size: 32px;
    margin-bottom: 12px;
}

.join-content p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.code-input-area {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.code-input-area input {
    padding: 16px 20px;
    font-size: 20px;
    font-family: 'Space Grotesk', monospace;
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    outline: none;
    transition: border-color 0.3s ease;
    text-transform: uppercase;
}

.code-input-area input:focus {
    border-color: var(--accent-primary);
}

.code-input-area input::placeholder {
    color: rgba(255, 255, 255, 0.3);
    text-transform: none;
}

#join-name {
    font-size: 18px;
    text-transform: none;
}

.submit-btn {
    width: 100%;
    padding: 16px 32px;
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    font-family: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.error-msg {
    color: #ef4444;
    margin-top: 16px;
    font-size: 14px;
}

.error-msg.hidden {
    display: none;
}

/* Host Lobby */
.lobby-content {
    text-align: center;
    padding: 40px 20px;
    max-width: 500px;
}

.lobby-content h2 {
    font-size: 28px;
    margin-bottom: 32px;
}

.session-code-display {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--accent-primary);
    border-radius: 20px;
    padding: 24px 40px;
    margin-bottom: 32px;
}

.code-label {
    display: block;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.session-code {
    font-family: 'Space Grotesk', monospace;
    font-size: 48px;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--accent-glow);
}

.participants-area {
    margin-bottom: 32px;
}

.participants-area h3 {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.participants-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    min-height: 60px;
}

.waiting-msg {
    color: var(--text-secondary);
    font-style: italic;
}

.participant-chip {
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid var(--success);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    animation: popIn 0.3s ease;
}

@keyframes popIn {
    0% { transform: scale(0); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.start-btn {
    width: 100%;
    padding: 20px 32px;
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--success), #059669);
    border: none;
    border-radius: 16px;
    color: white;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.3s ease;
}

.start-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: rgba(255, 255, 255, 0.1);
}

.start-btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(16, 185, 129, 0.4);
}

/* Game Screen */
#game-screen {
    pointer-events: none;
    background: transparent;
}

#game-screen.active {
    pointer-events: auto;
}

/* HUD */
.hud {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 20px;
    z-index: 20;
    pointer-events: none;
}

.hud-left, .hud-right {
    min-width: 120px;
}

.session-info {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    padding: 12px 20px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.live-code {
    font-family: 'Space Grotesk', monospace;
    font-size: 14px;
    color: var(--accent-glow);
    letter-spacing: 1px;
}

.live-count {
    font-size: 12px;
    color: var(--text-secondary);
}

.sync-meter {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 12px;
    text-align: center;
    min-width: 200px;
}

.sync-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.sync-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 6px;
}

.sync-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-primary), var(--success));
    border-radius: 4px;
    transition: width 0.3s ease;
}

.sync-percent {
    font-size: 18px;
    font-weight: 700;
    color: var(--success);
}

.bounce-count {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    padding: 12px 20px;
    border-radius: 12px;
    text-align: center;
}

.count-num {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-glow);
}

.count-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Breath Guide */
.breath-guide {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 20;
    opacity: 0.8;
}

.guide-text {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.guide-icon {
    font-size: 40px;
    animation: breathePulse 2s ease-in-out infinite;
}

@keyframes breathePulse {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.2); opacity: 1; }
}

/* Rhythm Indicator (Host) */
.rhythm-indicator {
    position: fixed;
    bottom: 180px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 20;
}

.rhythm-indicator.hidden {
    display: none;
}

.rhythm-pulse {
    width: 80px;
    height: 80px;
    border: 3px solid var(--accent-glow);
    border-radius: 50%;
    margin: 0 auto 12px;
    animation: rhythmPulse 2s ease-in-out infinite;
}

@keyframes rhythmPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.3); opacity: 1; }
}

.rhythm-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Message Display */
.message-display {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 30;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    padding: 24px 48px;
    border-radius: 20px;
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    border: 2px solid var(--accent-primary);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.message-display.hidden {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
    pointer-events: none;
}

/* Host Controls */
.host-game-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 20;
}

.host-game-controls.hidden {
    display: none;
}

.end-btn {
    padding: 12px 24px;
    background: rgba(239, 68, 68, 0.2);
    border: 2px solid #ef4444;
    border-radius: 12px;
    color: #ef4444;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.3s ease;
}

.end-btn:hover {
    background: rgba(239, 68, 68, 0.4);
}

/* End Screen */
.end-content {
    text-align: center;
    padding: 40px 20px;
}

.celebration-emoji {
    font-size: 72px;
    margin-bottom: 24px;
    animation: bounce 1s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.end-content h1 {
    font-size: 42px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff, var(--accent-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.end-subtitle {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 40px;
}

.final-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 48px;
    font-weight: 700;
    color: var(--accent-glow);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.restart-btn {
    padding: 16px 40px;
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    font-family: inherit;
    transition: transform 0.2s ease;
}

.restart-btn:hover {
    transform: translateY(-2px);
}

/* Mobile */
@media (max-width: 600px) {
    .hud {
        flex-wrap: wrap;
        gap: 10px;
        padding: 10px;
    }
    
    .sync-meter {
        order: -1;
        width: 100%;
        min-width: auto;
    }
    
    .session-code {
        font-size: 36px;
    }
    
    .logo-area h1 {
        font-size: 32px;
    }
    
    .final-stats {
        gap: 24px;
    }
    
    .stat-value {
        font-size: 36px;
    }
}